[FFmpeg-devel] [PATCH v15] avformat/dashdec: add dash demuxer base version
刘歧
lq at chinaffmpeg.org
Mon Aug 28 13:27:04 EEST 2017
> 在 2017年8月28日，18:12，samsamsam <samsamsam at o2.pl> 写道：
>
> Validation will be very simple. I am talking about something like this:
> static int get_repl_pattern_and_format(const char *i_url, const char *i_marker, char **o_pattern, char **o_format)
> {
> ...
> + for(ptr=start + marker_len; ptr < (end - 1); ++ptr) { /*there is need to check this condition :P */
> + if (*ptr != '0') {
> + // Unknown format add log here
> + goto finish;
> + }
> + }
> format_len = end - start - marker_len - 1 + strlen(PRId64);
> *o_format = av_mallocz(format_len+1);
> strncpy(*o_format, start + marker_len, end - start - marker_len -1);
> strcat(*o_format, PRId64);
> …
> }
maybe more complex than this way, for example:
%d
%lld
%04lld
%PRId64
%PRId32
%PRId16
and think about the safety :
%02c%lld
%s%d%d%d%d
and so on,blablabla.
maybe we need to think a perfect solution.
>
>
> Dnia 28 sierpnia 2017 11:30 Rodger Combs <rodger.combs at gmail.com> napisał(a):
>
> I would expect parsing the number internally and using the additional arg to be simpler and easier to verify than format string validation.
>
>> On Aug 28, 2017, at 04:28, samsamsam <samsamsam at o2.pl> wrote:
>>
>> OK. I will.
>> What about adding validation of format instead of adding "something like `"%0*"PRId64`"?
>>
>> Dnia 28 sierpnia 2017 03:30 Rodger Combs <rodger.combs at gmail.com> napisał(a):
>>
>> If you know of such a vulnerability, report it to ffmpeg-security at ffmpeg.org. New code with known vulnerabilities will not be accepted.
>>
>> Sent from my iPhone
>>
>> On Aug 27, 2017, at 14:04, samsamsam <samsamsam at o2.pl> wrote:
>>> get_repl_pattern_and_format, you should have a fixed value of something like `"%0*"PRId64`
>>>
>>> If you afraid about safety then the only thing which need to be added to get_repl_pattern_and_format is validation of format.
>>> Simple loop to validate format will be enough. Do you agree?
>>>
>>> Anyway we are talking about safety but parser for mp4 atoms missing checking and there is quite easy to make segfault of the libavformat when try to prepared mp4 file.
>>>
>>> I understand that you want to have maximum safety with new code but I hope you know that ffmpeg at all is not safety.
>>>
>>> Regards,
>>> SSS
>>>
>>> Dnia 27 sierpnia 2017 16:34 Rodger Combs <rodger.combs at gmail.com> napisał(a):
>>>
>>> You're still calling snprintf with a string derived from the XML, which is still not safe. Rather than having a format copied from the source in get_repl_pattern_and_format, you should have a fixed value of something like `"%0*"PRId64`, and specify an additional "precision" argument you parse from the XML yourself. I can't reiterate this enough: _never pass data from the XML into the format-string arg of a printf-family function_.
>>>
>>> Also, rather than calling snprintf() twice with an av_malloc() in between, you can just call av_asprintf(). That's what it does internally anyway.
>>>
>>> On Aug 27, 2017, at 09:19, Steven Liu <lq at chinaffmpeg.org> wrote:
>>>
>>> ffmpeg need a dash demuxer for demux the dash formats base on
>>> https://github.com/samsamsam-iptvplayer/exteplayer3/blob/master/tmp/ffmpeg/patches/3.2.2/000001_add_dash_demux.patch
>>>
>>> TODO:
>>> 1. support multi bitrate dash
>>>
>>> v2 fixed:
>>> 1. from autodetect to disabled
>>> 2. from camelCase code style to ffmpeg code style
>>> 3. from RepType to AVMediaType
>>> 4. fix variable typo
>>> 5. change time value from uint32_t to uint64_t
>>> 6. removed be used once API
>>> 7. change 'time(NULL)`, except it is not 2038-safe.' to av_gettime and av_timegm
>>> 8. merge complex free operation to free_fragment
>>> 9. use API from snprintf to av_asprintf
>>>
>>> v3 fixed:
>>> 1. fix typo from --enabled-xml2 to --enable-xml2
>>>
>>> v4 fixed:
>>> 1. from --enable-xml2 to --enable-libxml2
>>> 2. move system includes to top
>>> 3. remove nouse includes
>>> 4. rename enum name
>>> 5. add a trailing comma for the last entry enum
>>> 6. fix comment typo
>>> 7. add const to DASHContext class front
>>> 8. check sscanf if return arguments and give warning message when error
>>> 9. check validity before free seg->url and seg
>>> 10. check if the val is null, before use atoll
>>>
>>> v5 fixed:
>>> 1. fix typo from mainifest to manifest
>>>
>>> v6 fixed:
>>> 1. from realloc to av_realloc
>>> 2. from free to av_free
>>>
>>> v7 fixed:
>>> 1. remove the -lxml2 from configure when require_pkg_config
>>>
>>> v8 fixed:
>>> 1. fix replace filename template by av_asprintf secure problem
>>>
>>> v9 modified:
>>> 1. make manifest parser clearly
>>>
>>> v10 fixed:
>>> 1. fix function API name code style
>>> 2. remove redundant strreplace call
>>> 3. remove redundant memory operation and check return value from get_content_url()
>>> 4. add space between ) and {
>>> 5. remove no need to log the value for print
>>>
>>> v11 fixed:
>>> 1. from atoll to strtoll
>>>
>>> v12 fixed:
>>> 1. remove strreplace and instead by av_strreplace
>>>
>>> v13 fixed:
>>> 1. fix bug: cannot play:
>>> http://dash.edgesuite.net/akamai/bbb_30fps/bbb_30fps.mpd
>>>
>>> v14 fixed:
>>> 1. fix bug: TLS connection was non-properly terminated
>>> 2. fix bug: No trailing CRLF found in HTTP header
>>>
>>> v15 fixed:
>>> 1. play youtube link: ffmpeg -i $(youtube-dl -J "https://www.youtube.com/watch?v=XmL19DOP_Ls" | jq -r ".requested_formats[0].manifest_url")
>>> 2. code refine for timeline living stream
>>>
>>> Reviewed-by: Clément Bœsch <u at pkh.me>
>>> Reviewed-by: Michael Niedermayer <michael at niedermayer.cc>
>>> Reviewed-by: Carl Eugen Hoyos <cehoyos at ag.or.at>
>>> Reviewed-by: Rodger Combs <rodger.combs at gmail.com>
>>> Reviewed-by: Moritz Barsnick <barsnick at gmx.net>
>>> Reviewed-by: Nicolas George <george at nsup.org>
>>> Reviewed-by: Ricardo Constantino <wiiaboo at gmail.com>
>>> Reviewed-by: wm4 <nfxjfg at googlemail.com>
>>> Tested-by: Andy Furniss <adf.lists at gmail.com>
>>> Reported-by: Andy Furniss <adf.lists at gmail.com>
>>> Signed-off-by: Steven Liu <lq at chinaffmpeg.org>
>>> Signed-off-by: samsamsam <samsamsam at o2.pl>
>>> ---
>>> configure | 4 +
>>> libavformat/Makefile | 1 +
>>> libavformat/allformats.c | 2 +-
>>> libavformat/dashdec.c | 1981 ++++++++++++++++++++++++++++++++++++++++++++++
>>> 4 files changed, 1987 insertions(+), 1 deletion(-)
>>> create mode 100644 libavformat/dashdec.c
>>>
>>> diff --git a/configure b/configure
>>> index 05f6dcc99a..7a7d61fa13 100755
>>> --- a/configure
>>> +++ b/configure
>>> @@ -272,6 +272,7 @@ External library support:
>>> --enable-libxcb-shape enable X11 grabbing shape rendering [autodetect]
>>> --enable-libxvid enable Xvid encoding via xvidcore,
>>> native MPEG-4/Xvid encoder exists [no]
>>> + --enable-libxml2 enable XML parsing using the C library libxml2 [no]
>>> --enable-libzimg enable z.lib, needed for zscale filter [no]
>>> --enable-libzmq enable message passing via libzmq [no]
>>> --enable-libzvbi enable teletext support via libzvbi [no]
>>> @@ -1576,6 +1577,7 @@ EXTERNAL_LIBRARY_LIST="
>>> libvpx
>>> libwavpack
>>> libwebp
>>> + libxml2
>>> libzimg
>>> libzmq
>>> libzvbi
>>> @@ -2937,6 +2939,7 @@ avi_muxer_select="riffenc"
>>> caf_demuxer_select="iso_media riffdec"
>>> caf_muxer_select="iso_media"
>>> dash_muxer_select="mp4_muxer"
>>> +dash_demuxer_deps="libxml2"
>>> dirac_demuxer_select="dirac_parser"
>>> dts_demuxer_select="dca_parser"
>>> dtshd_demuxer_select="dca_parser"
>>> @@ -5996,6 +5999,7 @@ enabled openssl && { use_pkg_config openssl openssl/ssl.h OPENSSL_init
>>> check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
>>> die "ERROR: openssl not found"; }
>>> enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h || disable qtkit_indev; }
>>> +enabled libxml2 && require_pkg_config libxml-2.0 libxml2/libxml/xmlversion.h xmlCheckVersion
>>>
>>> if enabled gcrypt; then
>>> GCRYPT_CONFIG="${cross_prefix}libgcrypt-config"
>>> diff --git a/libavformat/Makefile b/libavformat/Makefile
>>> index f2b465cfa2..3d478749d0 100644
>>> --- a/libavformat/Makefile
>>> +++ b/libavformat/Makefile
>>> @@ -133,6 +133,7 @@ OBJS-$(CONFIG_CRC_MUXER) += crcenc.o
>>> OBJS-$(CONFIG_DATA_DEMUXER) += rawdec.o
>>> OBJS-$(CONFIG_DATA_MUXER) += rawenc.o
>>> OBJS-$(CONFIG_DASH_MUXER) += dashenc.o
>>> +OBJS-$(CONFIG_DASH_DEMUXER) += dashdec.o
>>> OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o
>>> OBJS-$(CONFIG_DAUD_MUXER) += daudenc.o
>>> OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o
>>> diff --git a/libavformat/allformats.c b/libavformat/allformats.c
>>> index cd8200ea1c..aeb9b710fe 100644
>>> --- a/libavformat/allformats.c
>>> +++ b/libavformat/allformats.c
>>> @@ -96,7 +96,7 @@ static void register_all(void)
>>> REGISTER_DEMUXER (CINE, cine);
>>> REGISTER_DEMUXER (CONCAT, concat);
>>> REGISTER_MUXER (CRC, crc);
>>> - REGISTER_MUXER (DASH, dash);
>>> + REGISTER_MUXDEMUX(DASH, dash);
>>> REGISTER_MUXDEMUX(DATA, data);
>>> REGISTER_MUXDEMUX(DAUD, daud);
>>> REGISTER_DEMUXER (DCSTR, dcstr);
>>> diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
>>> new file mode 100644
>>> index 0000000000..4718ce24ab
>>> --- /dev/null
>>> +++ b/libavformat/dashdec.c
>>> @@ -0,0 +1,1981 @@
>>> +/*
>>> + * Dynamic Adaptive Streaming over HTTP demux
>>> + * Copyright (c) 2017 samsamsam at o2.pl based on HLS demux
>>> + * Copyright (c) 2017 Steven Liu
>>> + *
>>> + * This file is part of FFmpeg.
>>> + *
>>> + * FFmpeg is free software; you can redistribute it and/or
>>> + * modify it under the terms of the GNU Lesser General Public
>>> + * License as published by the Free Software Foundation; either
>>> + * version 2.1 of the License, or (at your option) any later version.
>>> + *
>>> + * FFmpeg is distributed in the hope that it will be useful,
>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>>> + * Lesser General Public License for more details.
>>> + *
>>> + * You should have received a copy of the GNU Lesser General Public
>>> + * License along with FFmpeg; if not, write to the Free Software
>>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
>>> + */
>>> +#include <libxml/parser.h>
>>> +#include "libavutil/intreadwrite.h"
>>> +#include "libavutil/opt.h"
>>> +#include "libavutil/time.h"
>>> +#include "libavutil/parseutils.h"
>>> +#include "internal.h"
>>> +#include "avio_internal.h"
>>> +
>>> +#define INITIAL_BUFFER_SIZE 32768
>>> +
>>> +struct fragment {
>>> + int64_t url_offset;
>>> + int64_t size;
>>> + char *url;
>>> +};
>>> +
>>> +/*
>>> + * reference to : ISO_IEC_23009-1-DASH-2012
>>> + * Section: 5.3.9.6.2
>>> + * Table: Table 17 — Semantics of SegmentTimeline element
>>> + * */
>>> +struct timeline {
>>> + /* t: Element or Attribute Name
>>> + * specifies the MPD start time, in @timescale units,
>>> + * the first Segment in the series starts relative to the beginning of the Period.
>>> + * The value of this attribute must be equal to or greater than the sum of the previous S
>>> + * element earliest presentation time and the sum of the contiguous Segment durations.
>>> + * If the value of the attribute is greater than what is expressed by the previous S element,
>>> + * it expresses discontinuities in the timeline.
>>> + * If not present then the value shall be assumed to be zero for the first S element
>>> + * and for the subsequent S elements, the value shall be assumed to be the sum of
>>> + * the previous S element's earliest presentation time and contiguous duration
>>> + * (i.e. previous S at t + @d * (@r + 1)).
>>> + * */
>>> + int64_t t;
>>> + /* r: Element or Attribute Name
>>> + * specifies the repeat count of the number of following contiguous Segments with
>>> + * the same duration expressed by the value of @d. This value is zero-based
>>> + * (e.g. a value of three means four Segments in the contiguous series).
>>> + * */
>>> + int64_t r;
>>> + /* d: Element or Attribute Name
>>> + * specifies the Segment duration, in units of the value of the @timescale.
>>> + * */
>>> + int64_t d;
>>> +};
>>> +
>>> +enum DASHTmplUrlType {
>>> + TMP_URL_TYPE_UNSPECIFIED,
>>> + TMP_URL_TYPE_NUMBER,
>>> + TMP_URL_TYPE_TIME,
>>> +};
>>> +
>>> +/*
>>> + * Each playlist has its own demuxer. If it is currently active,
>>> + * it has an opened AVIOContext too, and potentially an AVPacket
>>> + * containing the next packet from this stream.
>>> + */
>>> +struct representation {
>>> + char *url_template;
>>> + char *url_template_pattern;
>>> + char *url_template_format;
>>> + enum DASHTmplUrlType tmp_url_type;
>>> + AVIOContext pb;
>>> + AVIOContext *input;
>>> + AVFormatContext *parent;
>>> + AVFormatContext *ctx;
>>> + AVPacket pkt;
>>> + int rep_idx;
>>> + int rep_count;
>>> + int stream_index;
>>> +
>>> + enum AVMediaType type;
>>> + int64_t target_duration;
>>> +
>>> + int n_fragments;
>>> + struct fragment **fragments; /* VOD list of fragment for profile */
>>> +
>>> + int n_timelines;
>>> + struct timeline **timelines;
>>> +
>>> + int64_t first_seq_no;
>>> + int64_t last_seq_no;
>>> + int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
>>> +
>>> + int64_t fragment_duration;
>>> + int64_t fragment_timescale;
>>> +
>>> + int64_t presentation_timeoffset;
>>> +
>>> + int64_t cur_seq_no;
>>> + int64_t cur_seg_offset;
>>> + int64_t cur_seg_size;
>>> + struct fragment *cur_seg;
>>> +
>>> + /* Currently active Media Initialization Section */
>>> + struct fragment *init_section;
>>> + uint8_t *init_sec_buf;
>>> + uint32_t init_sec_buf_size;
>>> + uint32_t init_sec_data_len;
>>> + uint32_t init_sec_buf_read_offset;
>>> + int fix_multiple_stsd_order;
>>> + int64_t cur_timestamp;
>>> + int is_restart_needed;
>>> +};
>>> +
>>> +typedef struct DASHContext {
>>> + const AVClass *class;
>>> + char *base_url;
>>> + struct representation *cur_video;
>>> + struct representation *cur_audio;
>>> +
>>> + /* MediaPresentationDescription Attribute */
>>> + uint64_t media_presentation_duration;
>>> + uint64_t suggested_presentation_delay;
>>> + uint64_t availability_start_time;
>>> + uint64_t publish_time;
>>> + uint64_t minimum_update_period;
>>> + uint64_t time_shift_buffer_depth;
>>> + uint64_t min_buffer_time;
>>> +
>>> + /* Period Attribute */
>>> + uint64_t period_duration;
>>> + uint64_t period_start;
>>> +
>>> + int is_live;
>>> + AVIOInterruptCB *interrupt_callback;
>>> + char *user_agent; ///< holds HTTP user agent set as an AVOption to the HTTP protocol context
>>> + char *cookies; ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context
>>> + char *headers; ///< holds HTTP headers set as an AVOption to the HTTP protocol context
>>> + AVDictionary *avio_opts;
>>> +} DASHContext;
>>> +
>>> +static uint64_t get_current_time_in_sec(void)
>>> +{
>>> + return av_gettime() / 1000000;
>>> +}
>>> +
>>> +static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
>>> +{
>>> + struct tm timeinfo;
>>> + int year = 0;
>>> + int month = 0;
>>> + int day = 0;
>>> + int hour = 0;
>>> + int minute = 0;
>>> + int ret = 0;
>>> + float second = 0.0;
>>> +
>>> + /* ISO-8601 date parser */
>>> + if (!datetime)
>>> + return 0;
>>> +
>>> + ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
>>> + /* year, month, day, hour, minute, second 6 arguments */
>>> + if (ret != 6) {
>>> + av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
>>> + }
>>> + timeinfo.tm_year = year - 1900;
>>> + timeinfo.tm_mon = month - 1;
>>> + timeinfo.tm_mday = day;
>>> + timeinfo.tm_hour = hour;
>>> + timeinfo.tm_min = minute;
>>> + timeinfo.tm_sec = (int)second;
>>> +
>>> + return av_timegm(&timeinfo);
>>> +}
>>> +
>>> +static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
>>> +{
>>> + /* ISO-8601 duration parser */
>>> + uint32_t days = 0;
>>> + uint32_t hours = 0;
>>> + uint32_t mins = 0;
>>> + uint32_t secs = 0;
>>> + uint32_t size = 0;
>>> + float value = 0;
>>> + uint8_t type = 0;
>>> + const char *ptr = duration;
>>> +
>>> + while (*ptr) {
>>> + if (*ptr == 'P' || *ptr == 'T') {
>>> + ptr++;
>>> + continue;
>>> + }
>>> +
>>> + if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
>>> + av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
>>> + return 0; /* parser error */
>>> + }
>>> + switch (type) {
>>> + case 'D':
>>> + days = (uint32_t)value;
>>> + break;
>>> + case 'H':
>>> + hours = (uint32_t)value;
>>> + break;
>>> + case 'M':
>>> + mins = (uint32_t)value;
>>> + break;
>>> + case 'S':
>>> + secs = (uint32_t)value;
>>> + break;
>>> + default:
>>> + // handle invalid type
>>> + break;
>>> + }
>>> + ptr += size;
>>> + }
>>> + return ((days * 24 + hours) * 60 + mins) * 60 + secs;
>>> +}
>>> +
>>> +static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
>>> +{
>>> + int64_t start_time = 0;
>>> + int64_t i = 0;
>>> + int64_t j = 0;
>>> + int64_t num = 0;
>>> +
>>> + if (pls->n_timelines) {
>>> + for (i = 0; i < pls->n_timelines; i++) {
>>> + if (pls->timelines[i]->t > 0) {
>>> + start_time = pls->timelines[i]->t;
>>> + }
>>> + if (num == cur_seq_no)
>>> + goto finish;
>>> +
>>> + start_time += pls->timelines[i]->d;
>>> + for (j = 0; j < pls->timelines[i]->r; j++) {
>>> + num++;
>>> + if (num == cur_seq_no)
>>> + goto finish;
>>> + start_time += pls->timelines[i]->d;
>>> + }
>>> + num++;
>>> + }
>>> + }
>>> +finish:
>>> + return start_time;
>>> +}
>>> +
>>> +static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
>>> +{
>>> + int64_t i = 0;
>>> + int64_t j = 0;
>>> + int64_t num = 0;
>>> + int64_t start_time = 0;
>>> +
>>> + for (i = 0; i < pls->n_timelines; i++) {
>>> + if (pls->timelines[i]->t > 0) {
>>> + start_time = pls->timelines[i]->t;
>>> + }
>>> + if (start_time > cur_time)
>>> + goto finish;
>>> +
>>> + start_time += pls->timelines[i]->d;
>>> + for (j = 0; j < pls->timelines[i]->r; j++) {
>>> + num++;
>>> + if (start_time > cur_time)
>>> + goto finish;
>>> + start_time += pls->timelines[i]->d;
>>> + }
>>> + num++;
>>> + }
>>> +
>>> + return -1;
>>> +
>>> +finish:
>>> + return num;
>>> +}
>>> +
>>> +static void free_fragment(struct fragment **seg)
>>> +{
>>> + if (!(*seg)) {
>>> + return;
>>> + }
>>> + av_freep(&(*seg)->url);
>>> + av_freep(seg);
>>> +}
>>> +
>>> +static void free_fragment_list(struct representation *pls)
>>> +{
>>> + int i;
>>> +
>>> + for (i = 0; i < pls->n_fragments; i++) {
>>> + free_fragment(&pls->fragments[i]);
>>> + }
>>> + av_freep(&pls->fragments);
>>> + pls->n_fragments = 0;
>>> +}
>>> +
>>> +static void free_timelines_list(struct representation *pls)
>>> +{
>>> + int i;
>>> +
>>> + for (i = 0; i < pls->n_timelines; i++) {
>>> + av_freep(&pls->timelines[i]);
>>> + }
>>> + av_freep(&pls->timelines);
>>> + pls->n_timelines = 0;
>>> +}
>>> +
>>> +static void free_representation(struct representation *pls)
>>> +{
>>> + free_fragment_list(pls);
>>> + free_timelines_list(pls);
>>> + free_fragment(&pls->cur_seg);
>>> + free_fragment(&pls->init_section);
>>> + av_freep(&pls->init_sec_buf);
>>> + av_freep(&pls->pb.buffer);
>>> + if (pls->input)
>>> + ff_format_io_close(pls->parent, &pls->input);
>>> + if (pls->ctx) {
>>> + pls->ctx->pb = NULL;
>>> + avformat_close_input(&pls->ctx);
>>> + }
>>> +
>>> + av_free(pls->url_template_pattern);
>>> + av_free(pls->url_template_format);
>>> + av_free(pls->url_template);
>>> + av_free(pls);
>>> +}
>>> +
>>> +static void update_options(char **dest, const char *name, void *src)
>>> +{
>>> + av_freep(dest);
>>> + av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
>>> + if (*dest)
>>> + av_freep(dest);
>>> +}
>>> +
>>> +static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
>>> + AVDictionary *opts, AVDictionary *opts2, int *is_http)
>>> +{
>>> + DASHContext *c = s->priv_data;
>>> + AVDictionary *tmp = NULL;
>>> + const char *proto_name = NULL;
>>> + int ret;
>>> + void *p = NULL;
>>> +
>>> + av_dict_copy(&tmp, opts, 0);
>>> + av_dict_copy(&tmp, opts2, 0);
>>> +
>>> + if (av_strstart(url, "crypto", NULL)) {
>>> + if (url[6] == '+' || url[6] == ':')
>>> + proto_name = avio_find_protocol_name(url + 7);
>>> + }
>>> +
>>> + if (!proto_name)
>>> + proto_name = avio_find_protocol_name(url);
>>> +
>>> + if (!proto_name)
>>> + return AVERROR_INVALIDDATA;
>>> +
>>> + // only http(s) & file are allowed
>>> + if (!av_strstart(proto_name, "http", NULL) && !av_strstart(proto_name, "file", NULL)) {
>>> + return AVERROR_INVALIDDATA;
>>> + }
>>> + if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':') {
>>> + ;
>>> + } else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':') {
>>> + ;
>>> + } else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5)) {
>>> + return AVERROR_INVALIDDATA;
>>> + }
>>> + ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
>>> + if (ret >= 0) {
>>> + // update cookies on http response with setcookies.
>>> + p = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
>>> + update_options(&c->cookies, "cookies", p);
>>> + av_dict_set(&opts, "cookies", c->cookies, 0);
>>> + }
>>> +
>>> + av_dict_free(&tmp);
>>> +
>>> + if (is_http)
>>> + *is_http = av_strstart(proto_name, "http", NULL);
>>> +
>>> + return ret;
>>> +
>>> +}
>>> +
>>> +static char *get_content_url(xmlNodePtr *baseurl_nodes,
>>> + int n_baseurl_nodes,
>>> + xmlChar *rep_id_val,
>>> + xmlChar *rep_bandwidth_val,
>>> + xmlChar *val)
>>> +{
>>> + int i;
>>> + xmlChar *text;
>>> + char *url = NULL;
>>> + char *tmp_str = av_mallocz(MAX_URL_SIZE);
>>> + char *tmp_str_2 = NULL;
>>> +
>>> + if (!tmp_str) {
>>> + return NULL;
>>> + }
>>> + for (i = 0; i < n_baseurl_nodes; ++i) {
>>> + if (baseurl_nodes[i] &&
>>> + baseurl_nodes[i]->children &&
>>> + baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
>>> + text = xmlNodeGetContent(baseurl_nodes[i]->children);
>>> + if (text) {
>>> + tmp_str_2 = av_mallocz(MAX_URL_SIZE);
>>> + if (!tmp_str_2) {
>>> + av_free(tmp_str);
>>> + return NULL;
>>> + }
>>> + ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, tmp_str, text);
>>> + av_free(tmp_str);
>>> + tmp_str = tmp_str_2;
>>> + xmlFree(text);
>>> + }
>>> + }
>>> + }
>>> + if (val)
>>> + av_strlcat(tmp_str, (const char*)val, MAX_URL_SIZE);
>>> +
>>> + if (rep_id_val) {
>>> + url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
>>> + av_free(tmp_str);
>>> + tmp_str = url;
>>> + }
>>> + if (rep_bandwidth_val && tmp_str)
>>> + url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
>>> + if (tmp_str != url)
>>> + av_free(tmp_str);
>>> + return url;
>>> +}
>>> +
>>> +static xmlChar *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const xmlChar *attrname)
>>> +{
>>> + int i;
>>> + xmlChar *val;
>>> +
>>> + for (i = 0; i < n_nodes; ++i) {
>>> + if (nodes[i]) {
>>> + val = xmlGetProp(nodes[i], attrname);
>>> + if (val)
>>> + return val;
>>> + }
>>> + }
>>> +
>>> + return NULL;
>>> +}
>>> +
>>> +static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const xmlChar *nodename)
>>> +{
>>> + xmlNodePtr node = rootnode;
>>> + if (!node) {
>>> + return NULL;
>>> + }
>>> +
>>> + node = xmlFirstElementChild(node);
>>> + while (node) {
>>> + if (!xmlStrcmp(node->name, nodename)) {
>>> + return node;
>>> + }
>>> + node = xmlNextElementSibling(node);
>>> + }
>>> + return NULL;
>>> +}
>>> +
>>> +static int get_repl_pattern_and_format(const char *i_url, const char *i_marker, char **o_pattern, char **o_format)
>>> +{
>>> + int ret = -1;
>>> + int marker_len = 0;
>>> + int format_len = 0;
>>> + char *prefix = NULL;
>>> + char *start = NULL;
>>> + char *end = NULL;
>>> +
>>> +
>>> + if (av_stristr(i_url, i_marker)) {
>>> + *o_pattern = av_strdup(i_marker);
>>> + *o_format = av_strdup("%"PRId64);
>>> + ret = 0;
>>> + } else {
>>> + prefix = av_strdup(i_marker);
>>> + marker_len = strlen(prefix)-1;
>>> + prefix[marker_len] = '\0';
>>> + start = av_stristr(i_url, prefix);
>>> + if (!start)
>>> + goto finish;
>>> +
>>> + end = strchr(start + 1, '$');
>>> + if (!end)
>>> + goto finish;
>>> +
>>> + if (start[marker_len] != '%')
>>> + goto finish;
>>> +
>>> + if (end[-1] != 'd')
>>> + goto finish;
>>> +
>>> + format_len = end - start - marker_len - 1 + strlen(PRId64);
>>> + *o_format = av_mallocz(format_len+1);
>>> + av_strlcpy(*o_format, start + marker_len, end - start - marker_len -1);
>>> + av_strlcat(*o_format, PRId64, strlen(*o_format) + strlen(PRId64));
>>> + *o_pattern = av_mallocz(end - start + 2);
>>> + if (*o_pattern) {
>>> + ret = AVERROR(EINVAL);
>>> + goto finish;
>>> + }
>>> + av_strlcpy(*o_pattern, start, end - start + 1);
>>> + ret = 0;
>>> +
>>> +finish:
>>> + av_free(prefix);
>>> + }
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +static enum AVMediaType get_content_type(xmlNodePtr node)
>>> +{
>>> + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
>>> + int i = 0;
>>> + const char *attr;
>>> + xmlChar *val = NULL;
>>> +
>>> + if (node) {
>>> + while (type == AVMEDIA_TYPE_UNKNOWN && i < 2) {
>>> + attr = (i) ? "mimeType" : "contentType";
>>> + val = xmlGetProp(node, attr);
>>> + if (val) {
>>> + if (av_stristr((const char *)val, "video")) {
>>> + type = AVMEDIA_TYPE_VIDEO;
>>> + } else if (av_stristr((const char *)val, "audio")) {
>>> + type = AVMEDIA_TYPE_AUDIO;
>>> + }
>>> + xmlFree(val);
>>> + }
>>> + i++;
>>> + }
>>> + }
>>> + return type;
>>> +}
>>> +
>>> +static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
>>> + xmlNodePtr fragmenturl_node,
>>> + xmlNodePtr *baseurl_nodes,
>>> + xmlChar *rep_id_val,
>>> + xmlChar *rep_bandwidth_val)
>>> +{
>>> + xmlChar *initialization_val = NULL;
>>> + xmlChar *media_val = NULL;
>>> +
>>> + if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar *)"Initialization")) {
>>> + initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
>>> + if (initialization_val) {
>>> + rep->init_section = av_mallocz(sizeof(struct fragment));
>>> + if (!rep->init_section) {
>>> + xmlFree(initialization_val);
>>> + return AVERROR(ENOMEM);
>>> + }
>>> + rep->init_section->url = get_content_url(baseurl_nodes, 4,
>>> + rep_id_val,
>>> + rep_bandwidth_val,
>>> + initialization_val);
>>> + if (!rep->init_section->url) {
>>> + av_free(rep->init_section);
>>> + xmlFree(initialization_val);
>>> + return AVERROR(ENOMEM);
>>> + }
>>> + rep->init_section->size = -1;
>>> + xmlFree(initialization_val);
>>> + }
>>> + } else if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar *)"SegmentURL")) {
>>> + media_val = xmlGetProp(fragmenturl_node, "media");
>>> + if (media_val) {
>>> + struct fragment *seg = av_mallocz(sizeof(struct fragment));
>>> + if (!seg) {
>>> + xmlFree(media_val);
>>> + return AVERROR(ENOMEM);
>>> + }
>>> + seg->url = get_content_url(baseurl_nodes, 4,
>>> + rep_id_val,
>>> + rep_bandwidth_val,
>>> + media_val);
>>> + if (!seg->url) {
>>> + av_free(seg);
>>> + xmlFree(media_val);
>>> + return AVERROR(ENOMEM);
>>> + }
>>> + seg->size = -1;
>>> + dynarray_add(&rep->fragments, &rep->n_fragments, seg);
>>> + xmlFree(media_val);
>>> + }
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
>>> + xmlNodePtr fragment_timeline_node)
>>> +{
>>> + xmlAttrPtr attr = NULL;
>>> + xmlChar *val = NULL;
>>> +
>>> + if (!xmlStrcmp(fragment_timeline_node->name, (const xmlChar *)"S")) {
>>> + struct timeline *tml = av_mallocz(sizeof(struct timeline));
>>> + if (!tml) {
>>> + return AVERROR(ENOMEM);
>>> + }
>>> + attr = fragment_timeline_node->properties;
>>> + while (attr) {
>>> + val = xmlGetProp(fragment_timeline_node, attr->name);
>>> +
>>> + if (!val) {
>>> + av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
>>> + continue;
>>> + }
>>> +
>>> + if (!xmlStrcmp(attr->name, (const xmlChar *)"t")) {
>>> + tml->t = (int64_t)strtoll(val, NULL, 10);
>>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"r")) {
>>> + tml->r =(int64_t) strtoll(val, NULL, 10);
>>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"d")) {
>>> + tml->d = (int64_t)strtoll(val, NULL, 10);
>>> +// rep->fragment_duration = (int64_t) strtoll(val, NULL, 10);
>>> + }
>>> + attr = attr->next;
>>> + xmlFree(val);
>>> + }
>>> + dynarray_add(&rep->timelines, &rep->n_timelines, tml);
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int parse_manifest_representation(AVFormatContext *s, const char *url,
>>> + xmlNodePtr node,
>>> + xmlNodePtr adaptionset_node,
>>> + xmlNodePtr mpd_baseurl_node,
>>> + xmlNodePtr period_baseurl_node,
>>> + xmlNodePtr fragment_template_node,
>>> + xmlNodePtr content_component_node,
>>> + xmlNodePtr adaptionset_baseurl_node)
>>> +{
>>> + int32_t ret = 0;
>>> + int32_t audio_rep_idx = 0;
>>> + int32_t video_rep_idx = 0;
>>> + char *temp_string = NULL;
>>> + DASHContext *c = s->priv_data;
>>> + struct representation *rep = NULL;
>>> + struct fragment *seg = NULL;
>>> + xmlNodePtr representation_segmenttemplate_node = NULL;
>>> + xmlNodePtr representation_baseurl_node = NULL;
>>> + xmlNodePtr representation_segmentlist_node = NULL;
>>> + xmlNodePtr fragment_timeline_node = NULL;
>>> + xmlNodePtr fragment_templates_tab[2];
>>> + xmlChar *duration_val = NULL;
>>> + xmlChar *presentation_timeoffset_val = NULL;
>>> + xmlChar *startnumber_val = NULL;
>>> + xmlChar *timescale_val = NULL;
>>> + xmlChar *initialization_val = NULL;
>>> + xmlChar *media_val = NULL;
>>> + xmlNodePtr baseurl_nodes[4];
>>> + xmlNodePtr representation_node = node;
>>> + xmlChar *rep_id_val = xmlGetProp(representation_node, "id");
>>> + xmlChar *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
>>> + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
>>> +
>>> + // try get information from representation
>>> + if (type == AVMEDIA_TYPE_UNKNOWN)
>>> + type = get_content_type(representation_node);
>>> + // try get information from contentComponen
>>> + if (type == AVMEDIA_TYPE_UNKNOWN)
>>> + type = get_content_type(content_component_node);
>>> + // try get information from adaption set
>>> + if (type == AVMEDIA_TYPE_UNKNOWN)
>>> + type = get_content_type(adaptionset_node);
>>> + if (type == AVMEDIA_TYPE_UNKNOWN) {
>>> + av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
>>> + } else if ((type == AVMEDIA_TYPE_VIDEO && !c->cur_video) || (type == AVMEDIA_TYPE_AUDIO && !c->cur_audio)) {
>>> + // convert selected representation to our internal struct
>>> + rep = av_mallocz(sizeof(struct representation));
>>> + if (!rep) {
>>> + ret = AVERROR(ENOMEM);
>>> + goto end;
>>> + }
>>> + representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
>>> + representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
>>> + representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
>>> +
>>> + baseurl_nodes[0] = mpd_baseurl_node;
>>> + baseurl_nodes[1] = period_baseurl_node;
>>> + baseurl_nodes[2] = adaptionset_baseurl_node;
>>> + baseurl_nodes[3] = representation_baseurl_node;
>>> +
>>> + if (representation_segmenttemplate_node || fragment_template_node) {
>>> + fragment_timeline_node = NULL;
>>> + fragment_templates_tab[0] = representation_segmenttemplate_node;
>>> + fragment_templates_tab[1] = fragment_template_node;
>>> +
>>> + presentation_timeoffset_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "presentationTimeOffset");
>>> + duration_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "duration");
>>> + startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "startNumber");
>>> + timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "timescale");
>>> + initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "initialization");
>>> + media_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "media");
>>> +
>>> + if (initialization_val) {
>>> + rep->init_section = av_mallocz(sizeof(struct fragment));
>>> + if (!rep->init_section) {
>>> + av_free(rep);
>>> + ret = AVERROR(ENOMEM);
>>> + goto end;
>>> + }
>>> + rep->init_section->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, initialization_val);
>>> + if (!rep->init_section->url) {
>>> + av_free(rep->init_section);
>>> + av_free(rep);
>>> + ret = AVERROR(ENOMEM);
>>> + goto end;
>>> + }
>>> + rep->init_section->size = -1;
>>> + xmlFree(initialization_val);
>>> + }
>>> +
>>> + if (media_val) {
>>> + rep->url_template = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, media_val);
>>> + temp_string = rep->url_template;
>>> + if (temp_string) {
>>> + if (av_stristr(temp_string, "$Number")) {
>>> + get_repl_pattern_and_format(temp_string, "$Number$", &(rep->url_template_pattern), &(rep->url_template_format));
>>> + rep->tmp_url_type = TMP_URL_TYPE_NUMBER; /* Number-Based. */
>>> + } else if (av_stristr(temp_string, "$Time")) {
>>> + get_repl_pattern_and_format(temp_string, "$Time$", &(rep->url_template_pattern), &(rep->url_template_format));
>>> + rep->tmp_url_type = TMP_URL_TYPE_TIME; /* Time-Based. */
>>> + } else {
>>> + temp_string = NULL;
>>> + }
>>> + }
>>> + xmlFree(media_val);
>>> + }
>>> +
>>> + if (presentation_timeoffset_val) {
>>> + rep->presentation_timeoffset = (int64_t) strtoll(presentation_timeoffset_val, NULL, 10);
>>> + xmlFree(presentation_timeoffset_val);
>>> + }
>>> + if (duration_val) {
>>> + rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
>>> + xmlFree(duration_val);
>>> + }
>>> + if (timescale_val) {
>>> + rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
>>> + xmlFree(timescale_val);
>>> + }
>>> + if (startnumber_val) {
>>> + rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
>>> + xmlFree(startnumber_val);
>>> + }
>>> +
>>> + fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
>>> +
>>> + if (!fragment_timeline_node)
>>> + fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
>>> + if (fragment_timeline_node) {
>>> + fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
>>> + while (fragment_timeline_node) {
>>> + ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
>>> + if (ret < 0) {
>>> + return ret;
>>> + }
>>> + fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
>>> + }
>>> + }
>>> + } else if (representation_baseurl_node && !representation_segmentlist_node) {
>>> + seg = av_mallocz(sizeof(struct fragment));
>>> + if (!seg) {
>>> + ret = AVERROR(ENOMEM);
>>> + goto end;
>>> + }
>>> + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, NULL);
>>> + if (!seg->url) {
>>> + av_free(seg);
>>> + ret = AVERROR(ENOMEM);
>>> + goto end;
>>> + }
>>> + seg->size = -1;
>>> + dynarray_add(&rep->fragments, &rep->n_fragments, seg);
>>> + } else if (representation_segmentlist_node) {
>>> + // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
>>> + // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
>>> + xmlNodePtr fragmenturl_node = NULL;
>>> + duration_val = xmlGetProp(representation_segmentlist_node, "duration");
>>> + timescale_val = xmlGetProp(representation_segmentlist_node, "timescale");
>>> + if (duration_val) {
>>> + rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
>>> + xmlFree(duration_val);
>>> + }
>>> + if (timescale_val) {
>>> + rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
>>> + xmlFree(timescale_val);
>>> + }
>>> + fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
>>> + while (fragmenturl_node) {
>>> + ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
>>> + baseurl_nodes,
>>> + rep_id_val,
>>> + rep_bandwidth_val);
>>> + if (ret < 0) {
>>> + return ret;
>>> + }
>>> + fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
>>> + }
>>> +
>>> + fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
>>> +
>>> + if (!fragment_timeline_node)
>>> + fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
>>> + if (fragment_timeline_node) {
>>> + fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
>>> + while (fragment_timeline_node) {
>>> + ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
>>> + if (ret < 0) {
>>> + return ret;
>>> + }
>>> + fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
>>> + }
>>> + }
>>> + } else {
>>> + free_representation(rep);
>>> + rep = NULL;
>>> + av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
>>> + }
>>> +
>>> + if (rep) {
>>> + if (rep->fragment_duration > 0 && !rep->fragment_timescale)
>>> + rep->fragment_timescale = 1;
>>> + if (type == AVMEDIA_TYPE_VIDEO) {
>>> + rep->rep_idx = video_rep_idx;
>>> + c->cur_video = rep;
>>> + } else {
>>> + rep->rep_idx = audio_rep_idx;
>>> + c->cur_audio = rep;
>>> + }
>>> + }
>>> + }
>>> +
>>> + video_rep_idx += type == AVMEDIA_TYPE_VIDEO;
>>> + audio_rep_idx += type == AVMEDIA_TYPE_AUDIO;
>>> +
>>> +end:
>>> + if (rep_id_val)
>>> + xmlFree(rep_id_val);
>>> + if (rep_bandwidth_val)
>>> + xmlFree(rep_bandwidth_val);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
>>> + xmlNodePtr adaptionset_node,
>>> + xmlNodePtr mpd_baseurl_node,
>>> + xmlNodePtr period_baseurl_node)
>>> +{
>>> + int ret = 0;
>>> + xmlNodePtr fragment_template_node = NULL;
>>> + xmlNodePtr content_component_node = NULL;
>>> + xmlNodePtr adaptionset_baseurl_node = NULL;
>>> + xmlNodePtr node = NULL;
>>> +
>>> + node = xmlFirstElementChild(adaptionset_node);
>>> + while (node) {
>>> + if (!xmlStrcmp(node->name, (const xmlChar *)"SegmentTemplate")) {
>>> + fragment_template_node = node;
>>> + } else if (!xmlStrcmp(node->name, (const xmlChar *)"ContentComponent")) {
>>> + content_component_node = node;
>>> + } else if (!xmlStrcmp(node->name, (const xmlChar *)"BaseURL")) {
>>> + adaptionset_baseurl_node = node;
>>> + } else if (!xmlStrcmp(node->name, (const xmlChar *)"Representation")) {
>>> + ret = parse_manifest_representation(s, url, node,
>>> + adaptionset_node,
>>> + mpd_baseurl_node,
>>> + period_baseurl_node,
>>> + fragment_template_node,
>>> + content_component_node,
>>> + adaptionset_baseurl_node);
>>> + if (ret < 0) {
>>> + return ret;
>>> + }
>>> + }
>>> + node = xmlNextElementSibling(node);
>>> + }
>>> + return 0;
>>> +}
>>> +
>>> +
>>> +static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
>>> +{
>>> + DASHContext *c = s->priv_data;
>>> + int ret = 0;
>>> + int close_in = 0;
>>> + uint8_t *new_url = NULL;
>>> + int64_t filesize = 0;
>>> + char *buffer = NULL;
>>> + AVDictionary *opts = NULL;
>>> + xmlDoc *doc = NULL;
>>> + xmlNodePtr root_element = NULL;
>>> + xmlNodePtr node = NULL;
>>> + xmlNodePtr period_node = NULL;
>>> + xmlNodePtr mpd_baseurl_node = NULL;
>>> + xmlNodePtr period_baseurl_node = NULL;
>>> + xmlNodePtr adaptionset_node = NULL;
>>> + xmlAttrPtr attr = NULL;
>>> + xmlChar *val = NULL;
>>> + uint32_t perdiod_duration_sec = 0;
>>> + uint32_t perdiod_start_sec = 0;
>>> + int32_t audio_rep_idx = 0;
>>> + int32_t video_rep_idx = 0;
>>> +
>>> + if (!in) {
>>> + close_in = 1;
>>> + /* This is XML manifest there is no need to set range header */
>>> + av_dict_set(&opts, "seekable", "0", 0);
>>> + // broker prior HTTP options that should be consistent across requests
>>> + av_dict_set(&opts, "user-agent", c->user_agent, 0);
>>> + av_dict_set(&opts, "cookies", c->cookies, 0);
>>> + av_dict_set(&opts, "headers", c->headers, 0);
>>> +
>>> + ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
>>> + av_dict_free(&opts);
>>> + if (ret < 0)
>>> + return ret;
>>> + }
>>> +
>>> + if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) {
>>> + c->base_url = av_strdup(new_url);
>>> + } else {
>>> + c->base_url = av_strdup(url);
>>> + }
>>> +
>>> + filesize = avio_size(in);
>>> + if (filesize <= 0) {
>>> + filesize = 8 * 1024;
>>> + }
>>> +
>>> + buffer = av_mallocz(filesize);
>>> + if (!buffer) {
>>> + return AVERROR(ENOMEM);
>>> + }
>>> +
>>> + filesize = avio_read(in, buffer, filesize);
>>> + if (filesize > 0) {
>>> + LIBXML_TEST_VERSION
>>> +
>>> + doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
>>> + root_element = xmlDocGetRootElement(doc);
>>> + node = root_element;
>>> +
>>> + if (!node) {
>>> + ret = AVERROR_INVALIDDATA;
>>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
>>> + goto cleanup;
>>> + }
>>> +
>>> + if (node->type != XML_ELEMENT_NODE ||
>>> + xmlStrcmp(node->name, (const xmlChar *)"MPD")) {
>>> + ret = AVERROR_INVALIDDATA;
>>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
>>> + goto cleanup;
>>> + }
>>> +
>>> + val = xmlGetProp(node, "type");
>>> + if (!val) {
>>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
>>> + ret = AVERROR_INVALIDDATA;
>>> + goto cleanup;
>>> + }
>>> + if (!xmlStrcmp(val, (const xmlChar *)"dynamic"))
>>> + c->is_live = 1;
>>> + xmlFree(val);
>>> +
>>> + attr = node->properties;
>>> + while (attr) {
>>> + val = xmlGetProp(node, attr->name);
>>> +
>>> + if (!xmlStrcmp(attr->name, (const xmlChar *)"availabilityStartTime")) {
>>> + c->availability_start_time = get_utc_date_time_insec(s, (const char *)val);
>>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"publishTime")) {
>>> + c->publish_time = get_utc_date_time_insec(s, (const char *)val);
>>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"minimumUpdatePeriod")) {
>>> + c->minimum_update_period = get_duration_insec(s, (const char *)val);
>>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"timeShiftBufferDepth")) {
>>> + c->time_shift_buffer_depth = get_duration_insec(s, (const char *)val);
>>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"minBufferTime")) {
>>> + c->min_buffer_time = get_duration_insec(s, (const char *)val);
>>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"suggestedPresentationDelay")) {
>>> + c->suggested_presentation_delay = get_duration_insec(s, (const char *)val);
>>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"mediaPresentationDuration")) {
>>> + c->media_presentation_duration = get_duration_insec(s, (const char *)val);
>>> + }
>>> + attr = attr->next;
>>> + xmlFree(val);
>>> + }
>>> +
>>> + mpd_baseurl_node = find_child_node_by_name(node, "BaseURL");
>>> +
>>> + // at now we can handle only one period, with the longest duration
>>> + node = xmlFirstElementChild(node);
>>> + while (node) {
>>> + if (!xmlStrcmp(node->name, (const xmlChar *)"Period")) {
>>> + perdiod_duration_sec = 0;
>>> + perdiod_start_sec = 0;
>>> + attr = node->properties;
>>> + while (attr) {
>>> + val = xmlGetProp(node, attr->name);
>>> + if (!xmlStrcmp(attr->name, (const xmlChar *)"duration")) {
>>> + perdiod_duration_sec = get_duration_insec(s, (const char *)val);
>>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"start")) {
>>> + perdiod_start_sec = get_duration_insec(s, (const char *)val);
>>> + }
>>> + attr = attr->next;
>>> + xmlFree(val);
>>> + }
>>> + if ((perdiod_duration_sec) >= (c->period_duration)) {
>>> + period_node = node;
>>> + c->period_duration = perdiod_duration_sec;
>>> + c->period_start = perdiod_start_sec;
>>> + if (c->period_start > 0)
>>> + c->media_presentation_duration = c->period_duration;
>>> + }
>>> + }
>>> + node = xmlNextElementSibling(node);
>>> + }
>>> + if (!period_node) {
>>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
>>> + ret = AVERROR_INVALIDDATA;
>>> + goto cleanup;
>>> + }
>>> +
>>> + adaptionset_node = xmlFirstElementChild(period_node);
>>> + while (adaptionset_node) {
>>> + if (!xmlStrcmp(adaptionset_node->name, (const xmlChar *)"BaseURL")) {
>>> + period_baseurl_node = adaptionset_node;
>>> + } else if (!xmlStrcmp(adaptionset_node->name, (const xmlChar *)"AdaptationSet")) {
>>> + parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node);
>>> + }
>>> + adaptionset_node = xmlNextElementSibling(adaptionset_node);
>>> + }
>>> + if (c->cur_video) {
>>> + c->cur_video->rep_count = video_rep_idx;
>>> + c->cur_video->fix_multiple_stsd_order = 1;
>>> + av_log(s, AV_LOG_VERBOSE, "rep_idx[%d]\n", (int)c->cur_video->rep_idx);
>>> + av_log(s, AV_LOG_VERBOSE, "rep_count[%d]\n", (int)video_rep_idx);
>>> + }
>>> + if (c->cur_audio) {
>>> + c->cur_audio->rep_count = audio_rep_idx;
>>> + }
>>> +cleanup:
>>> + /*free the document */
>>> + xmlFreeDoc(doc);
>>> + xmlCleanupParser();
>>> + } else {
>>> + av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url);
>>> + ret = AVERROR_INVALIDDATA;
>>> + }
>>> +
>>> + av_free(new_url);
>>> + av_free(buffer);
>>> + if (close_in) {
>>> + avio_close(in);
>>> + }
>>> + return ret;
>>> +}
>>> +
>>> +static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
>>> +{
>>> + DASHContext *c = s->priv_data;
>>> + int64_t num = 0;
>>> + int64_t start_time_offset = 0;
>>> +
>>> + if (c->is_live) {
>>> + if (pls->n_fragments) {
>>> + num = pls->first_seq_no;
>>> + } else if (pls->n_timelines) {
>>> + start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - pls->timelines[pls->first_seq_no]->t; // total duration of playlist
>>> + if (start_time_offset < 60 * pls->fragment_timescale)
>>> + start_time_offset = 0;
>>> + else
>>> + start_time_offset = start_time_offset - 60 * pls->fragment_timescale;
>>> +
>>> + num = calc_next_seg_no_from_timelines(pls, pls->timelines[pls->first_seq_no]->t + start_time_offset);
>>> + if (num == -1)
>>> + num = pls->first_seq_no;
>>> + } else {
>>> + if (pls->presentation_timeoffset) {
>>> + num = pls->presentation_timeoffset * pls->fragment_timescale / pls->fragment_duration;
>>> + } else if (c->publish_time > 0) {
>>> + num = pls->first_seq_no + (((c->publish_time - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
>>> + } else {
>>> + num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
>>> + }
>>> + }
>>> + } else {
>>> + num = pls->first_seq_no;
>>> + }
>>> + return num;
>>> +}
>>> +
>>> +static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
>>> +{
>>> + DASHContext *c = s->priv_data;
>>> + int64_t num = 0;
>>> +
>>> + if (c->is_live && pls->fragment_duration) {
>>> + num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->time_shift_buffer_depth) * pls->fragment_timescale) / pls->fragment_duration;
>>> + } else {
>>> + num = pls->first_seq_no;
>>> + }
>>> + return num;
>>> +}
>>> +
>>> +static int64_t calc_max_seg_no(struct representation *pls)
>>> +{
>>> + DASHContext *c = pls->parent->priv_data;
>>> + int64_t num = 0;
>>> +
>>> + if (pls->n_fragments) {
>>> + num = pls->first_seq_no + pls->n_fragments - 1;
>>> + } else if (pls->n_timelines) {
>>> + int i = 0;
>>> + num = pls->first_seq_no + pls->n_timelines - 1;
>>> + for (i = 0; i < pls->n_timelines; i++) {
>>> + num += pls->timelines[i]->r;
>>> + }
>>> + } else if (c->is_live) {
>>> + num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;
>>> + } else {
>>> + num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
>>> + }
>>> +
>>> + return num;
>>> +}
>>> +
>>> +static void move_timelines(struct representation *rep_src, struct representation *rep_dest)
>>> +{
>>> + if (rep_dest && rep_src ) {
>>> + free_timelines_list(rep_dest);
>>> + rep_dest->timelines = rep_src->timelines;
>>> + rep_dest->n_timelines = rep_src->n_timelines;
>>> + rep_dest->first_seq_no = rep_src->first_seq_no;
>>> + rep_dest->last_seq_no = calc_max_seg_no(rep_dest);
>>> + rep_src->timelines = NULL;
>>> + rep_src->n_timelines = 0;
>>> + rep_dest->cur_seq_no = rep_src->cur_seq_no;
>>> + }
>>> +}
>>> +
>>> +static void move_segments(struct representation *rep_src, struct representation *rep_dest)
>>> +{
>>> + if (rep_dest && rep_src ) {
>>> + free_fragment_list(rep_dest);
>>> + if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
>>> + rep_dest->cur_seq_no = 0;
>>> + else
>>> + rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
>>> + rep_dest->fragments = rep_src->fragments;
>>> + rep_dest->n_fragments = rep_src->n_fragments;
>>> + rep_dest->parent = rep_src->parent;
>>> + rep_dest->last_seq_no = calc_max_seg_no(rep_dest);
>>> + rep_src->fragments = NULL;
>>> + rep_src->n_fragments = 0;
>>> + }
>>> +}
>>> +
>>> +
>>> +static int refresh_manifest(AVFormatContext *s)
>>> +{
>>> +
>>> + int ret = 0;
>>> + DASHContext *c = s->priv_data;
>>> +
>>> + // save current context
>>> + struct representation *cur_video = c->cur_video;
>>> + struct representation *cur_audio = c->cur_audio;
>>> + char *base_url = c->base_url;
>>> +
>>> + c->base_url = NULL;
>>> + c->cur_video = NULL;
>>> + c->cur_audio = NULL;
>>> + ret = parse_manifest(s, s->filename, NULL);
>>> + if (ret)
>>> + goto finish;
>>> +
>>> + if (cur_video && cur_video->timelines || cur_audio && cur_audio->timelines) {
>>> + // calc current time
>>> + int64_t currentVideoTime = 0;
>>> + int64_t currentAudioTime = 0;
>>> + if (cur_video && cur_video->timelines)
>>> + currentVideoTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
>>> + if (cur_audio && cur_audio->timelines)
>>> + currentAudioTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
>>> + // update segments
>>> + if (cur_video && cur_video->timelines) {
>>> + c->cur_video->cur_seq_no = calc_next_seg_no_from_timelines(c->cur_video, currentVideoTime * cur_video->fragment_timescale - 1);
>>> + if (c->cur_video->cur_seq_no >= 0) {
>>> + move_timelines(c->cur_video, cur_video);
>>> + }
>>> + }
>>> + if (cur_audio && cur_audio->timelines) {
>>> + c->cur_audio->cur_seq_no = calc_next_seg_no_from_timelines(c->cur_audio, currentAudioTime * cur_audio->fragment_timescale - 1);
>>> + if (c->cur_audio->cur_seq_no >= 0) {
>>> + move_timelines(c->cur_audio, cur_audio);
>>> + }
>>> + }
>>> + }
>>> + if (cur_video && cur_video->fragments) {
>>> + move_segments(c->cur_video, cur_video);
>>> + }
>>> + if (cur_audio && cur_audio->fragments) {
>>> + move_segments(c->cur_audio, cur_audio);
>>> + }
>>> +
>>> +finish:
>>> + // restore context
>>> + if (c->base_url)
>>> + av_free(base_url);
>>> + else
>>> + c->base_url = base_url;
>>> + if (c->cur_audio)
>>> + free_representation(c->cur_audio);
>>> + if (c->cur_video)
>>> + free_representation(c->cur_video);
>>> + c->cur_audio = cur_audio;
>>> + c->cur_video = cur_video;
>>> + return ret;
>>> +}
>>> +
>>> +static struct fragment *get_current_fragment(struct representation *pls)
>>> +{
>>> + int64_t min_seq_no = 0;
>>> + int64_t max_seq_no = 0;
>>> + struct fragment *seg = NULL;
>>> + struct fragment *seg_ptr = NULL;
>>> + DASHContext *c = pls->parent->priv_data;
>>> +
>>> + while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
>>> + if (pls->cur_seq_no < pls->n_fragments) {
>>> + seg_ptr = pls->fragments[pls->cur_seq_no];
>>> + seg = av_mallocz(sizeof(struct fragment));
>>> + if (!seg) {
>>> + return NULL;
>>> + }
>>> + seg->url = av_strdup(seg_ptr->url);
>>> + if (!seg->url) {
>>> + av_free(seg);
>>> + return NULL;
>>> + }
>>> + seg->size = seg_ptr->size;
>>> + seg->url_offset = seg_ptr->url_offset;
>>> + return seg;
>>> + } else if (c->is_live) {
>>> + av_usleep(1000*1000);
>>> + refresh_manifest(pls->parent);
>>> + } else {
>>> + break;
>>> + }
>>> + }
>>> + if (c->is_live) {
>>> + while (!ff_check_interrupt(c->interrupt_callback)) {
>>> + min_seq_no = calc_min_seg_no(pls->parent, pls);
>>> + max_seq_no = calc_max_seg_no(pls);
>>> +
>>> + if (pls->cur_seq_no <= min_seq_no) {
>>> + av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n", (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no, (int)pls->rep_idx);
>>> + if (c->is_live && (pls->timelines || pls->fragments)) {
>>> + refresh_manifest(pls->parent);
>>> + }
>>> + pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
>>> + } else if (pls->cur_seq_no > max_seq_no) {
>>> + av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"], playlist %d\n", min_seq_no, max_seq_no, (int)pls->rep_idx);
>>> + av_usleep(1000*1000);
>>> + if (c->is_live && (pls->timelines || pls->fragments)) {
>>> + refresh_manifest(pls->parent);
>>> + }
>>> + continue;
>>> + }
>>> + break;
>>> + }
>>> + seg = av_mallocz(sizeof(struct fragment));
>>> + if (!seg) {
>>> + return NULL;
>>> + }
>>> + } else if (pls->cur_seq_no <= pls->last_seq_no) {
>>> + seg = av_mallocz(sizeof(struct fragment));
>>> + if (!seg) {
>>> + return NULL;
>>> + }
>>> + }
>>> + if (seg) {
>>> + if (pls->tmp_url_type != TMP_URL_TYPE_UNSPECIFIED) {
>>> + int64_t val = pls->tmp_url_type == TMP_URL_TYPE_NUMBER ? pls->cur_seq_no : get_segment_start_time_based_on_timeline(pls, pls->cur_seq_no);
>>> + int size = snprintf(NULL, 0, pls->url_template_format, val); // calc needed buffer size
>>> +
>>> + if (size > 0) {
>>> + char *tmp_val = av_mallocz(size + 1);
>>> + snprintf(tmp_val, size+1, pls->url_template_format, val);
>>> + seg->url = av_strireplace(pls->url_template, pls->url_template_pattern, tmp_val);
>>> + av_free(tmp_val);
>>> + }
>>> + }
>>> +
>>> + if (!seg->url) {
>>> + av_log(pls->parent, AV_LOG_ERROR, "Unable to resolve template url '%s'\n", pls->url_template);
>>> + seg->url = av_strdup(pls->url_template);
>>> + if (!seg->url) {
>>> + return NULL;
>>> + }
>>> + }
>>> +
>>> + seg->size = -1;
>>> + }
>>> +
>>> + return seg;
>>> +}
>>> +
>>> +enum ReadFromURLMode {
>>> + READ_NORMAL,
>>> + READ_COMPLETE,
>>> +};
>>> +
>>> +static int read_from_url(struct representation *pls, struct fragment *seg,
>>> + uint8_t *buf, int buf_size,
>>> + enum ReadFromURLMode mode)
>>> +{
>>> + int ret;
>>> +
>>> + /* limit read if the fragment was only a part of a file */
>>> + if (seg->size >= 0)
>>> + buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
>>> +
>>> + if (mode == READ_COMPLETE) {
>>> + ret = avio_read(pls->input, buf, buf_size);
>>> + if (ret < buf_size) {
>>> + av_log(pls->parent, AV_LOG_WARNING, "Could not read complete fragment.\n");
>>> + }
>>> + } else {
>>> + ret = avio_read(pls->input, buf, buf_size);
>>> + }
>>> + if (ret > 0)
>>> + pls->cur_seg_offset += ret;
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
>>> +{
>>> + AVDictionary *opts = NULL;
>>> + char url[MAX_URL_SIZE];
>>> + int ret;
>>> +
>>> + // broker prior HTTP options that should be consistent across requests
>>> + av_dict_set(&opts, "user-agent", c->user_agent, 0);
>>> + av_dict_set(&opts, "cookies", c->cookies, 0);
>>> + av_dict_set(&opts, "headers", c->headers, 0);
>>> + if (c->is_live) {
>>> + av_dict_set(&opts, "seekable", "0", 0);
>>> + }
>>> +
>>> + if (seg->size >= 0) {
>>> + /* try to restrict the HTTP request to the part we want
>>> + * (if this is in fact a HTTP request) */
>>> + av_dict_set_int(&opts, "offset", seg->url_offset, 0);
>>> + av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
>>> + }
>>> +
>>> + ff_make_absolute_url(url, MAX_URL_SIZE, c->base_url, seg->url);
>>> + av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n",
>>> + url, seg->url_offset, pls->rep_idx);
>>> + ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL);
>>> + if (ret < 0) {
>>> + goto cleanup;
>>> + }
>>> +
>>> + /* Seek to the requested position. If this was a HTTP request, the offset
>>> + * should already be where want it to, but this allows e.g. local testing
>>> + * without a HTTP server. */
>>> + if (!ret && seg->url_offset) {
>>> + int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET);
>>> + if (seekret < 0) {
>>> + av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of DASH fragment '%s'\n", seg->url_offset, seg->url);
>>> + ret = (int) seekret;
>>> + ff_format_io_close(pls->parent, &pls->input);
>>> + }
>>> + }
>>> +
>>> +cleanup:
>>> + av_dict_free(&opts);
>>> + pls->cur_seg_offset = 0;
>>> + pls->cur_seg_size = seg->size;
>>> + return ret;
>>> +}
>>> +
>>> +static int update_init_section(struct representation *pls)
>>> +{
>>> + static const int max_init_section_size = 1024*1024;
>>> + DASHContext *c = pls->parent->priv_data;
>>> + int64_t sec_size = 0;
>>> + int64_t urlsize = 0;
>>> + int ret = 0;
>>> +
>>> + /* read init section only once per representation */
>>> + if (!pls->init_section || pls->init_sec_buf) {
>>> + return 0;
>>> + }
>>> +
>>> + ret = open_input(c, pls, pls->init_section);
>>> + if (ret < 0) {
>>> + av_log(pls->parent, AV_LOG_WARNING, "Failed to open an initialization section in playlist %d\n", pls->rep_idx);
>>> + return ret;
>>> + }
>>> +
>>> + if (pls->init_section->size >= 0) {
>>> + sec_size = pls->init_section->size;
>>> + } else if ((urlsize = avio_size(pls->input)) >= 0) {
>>> + sec_size = urlsize;
>>> + } else {
>>> + sec_size = max_init_section_size;
>>> + }
>>> + av_log(pls->parent, AV_LOG_DEBUG, "Downloading an initialization section of size %"PRId64"\n", sec_size);
>>> + sec_size = FFMIN(sec_size, max_init_section_size);
>>> + av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
>>> + ret = read_from_url(pls, pls->init_section, pls->init_sec_buf, pls->init_sec_buf_size, READ_COMPLETE);
>>> + ff_format_io_close(pls->parent, &pls->input);
>>> + if (ret < 0)
>>> + return ret;
>>> +
>>> + if (pls->fix_multiple_stsd_order && pls->rep_idx > 0) {
>>> + uint8_t **stsd_entries = NULL;
>>> + int *stsd_entries_size = NULL;
>>> + int i = 4;
>>> +
>>> + while (i <= (ret - 4)) {
>>> + // find start stsd atom
>>> + if (!memcmp(pls->init_sec_buf + i, "stsd", 4)) {
>>> + /* 1B version
>>> + * 3B flags
>>> + * 4B num of entries */
>>> + int stsd_first_offset = i + 8;
>>> + int stsd_offset = 0;
>>> + int j = 0;
>>> + uint32_t stsd_count = AV_RB32(pls->init_sec_buf + stsd_first_offset);
>>> + stsd_first_offset += 4;
>>> + if (stsd_count != pls->rep_count) {
>>> + i++;
>>> + continue;
>>> + }
>>> + // find all stsd entries
>>> + stsd_entries = av_mallocz_array(stsd_count, sizeof(*stsd_entries));
>>> + stsd_entries_size = av_mallocz_array(stsd_count, sizeof(*stsd_entries_size));
>>> + for (j = 0; j < stsd_count; ++j) {
>>> + /* 4B - size
>>> + * 4B - format */
>>> + stsd_entries_size[j] = AV_RB32(pls->init_sec_buf + stsd_first_offset + stsd_offset);
>>> + stsd_entries[j] = av_malloc(stsd_entries_size[j]);
>>> + memcpy(stsd_entries[j], pls->init_sec_buf + stsd_first_offset + stsd_offset, stsd_entries_size[j]);
>>> + stsd_offset += stsd_entries_size[j];
>>> + }
>>> + // reorder stsd entries
>>> + // as first put stsd entry for current representation
>>> + j = pls->rep_idx;
>>> + stsd_offset = stsd_first_offset;
>>> + memcpy(pls->init_sec_buf + stsd_offset, stsd_entries[j], stsd_entries_size[j]);
>>> + stsd_offset += stsd_entries_size[j];
>>> + for (j = 0; j < stsd_count; ++j) {
>>> + if (j != pls->rep_idx) {
>>> + memcpy(pls->init_sec_buf + stsd_offset, stsd_entries[j], stsd_entries_size[j]);
>>> + stsd_offset += stsd_entries_size[j];
>>> + }
>>> + av_free(stsd_entries[j]);
>>> + }
>>> + av_freep(&stsd_entries);
>>> + av_freep(&stsd_entries_size);
>>> + break;
>>> + }
>>> + i++;
>>> + }
>>> + }
>>> +
>>> + av_log(pls->parent, AV_LOG_TRACE, "pls[%p] init section size[%d]\n", pls, (int)ret);
>>> + pls->init_sec_data_len = ret;
>>> + pls->init_sec_buf_read_offset = 0;
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int64_t seek_data(void *opaque, int64_t offset, int whence)
>>> +{
>>> + struct representation *v = opaque;
>>> + if (v->n_fragments && !v->init_sec_data_len) {
>>> + return avio_seek(v->input, offset, whence);
>>> + }
>>> +
>>> + return AVERROR(ENOSYS);
>>> +}
>>> +
>>> +static int read_data(void *opaque, uint8_t *buf, int buf_size)
>>> +{
>>> + int ret = 0;
>>> + struct representation *v = opaque;
>>> + DASHContext *c = v->parent->priv_data;
>>> +
>>> +restart:
>>> + if (!v->input) {
>>> + free_fragment(&v->cur_seg);
>>> + v->cur_seg = get_current_fragment(v);
>>> + if (!v->cur_seg) {
>>> + ret = AVERROR_EOF;
>>> + goto end;
>>> + }
>>> +
>>> + /* load/update Media Initialization Section, if any */
>>> + ret = update_init_section(v);
>>> + if (ret)
>>> + goto end;
>>> +
>>> + ret = open_input(c, v, v->cur_seg);
>>> + if (ret < 0) {
>>> + if (ff_check_interrupt(c->interrupt_callback)) {
>>> + goto end;
>>> + ret = AVERROR_EXIT;
>>> + }
>>> + av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist %d\n", v->rep_idx);
>>> + v->cur_seq_no++;
>>> + goto restart;
>>> + }
>>> + }
>>> +
>>> + if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
>>> + /* Push init section out first before first actual fragment */
>>> + int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
>>> + memcpy(buf, v->init_sec_buf, copy_size);
>>> + v->init_sec_buf_read_offset += copy_size;
>>> + ret = copy_size;
>>> + goto end;
>>> + }
>>> +
>>> + /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
>>> + if (!v->cur_seg) {
>>> + v->cur_seg = get_current_fragment(v);
>>> + }
>>> + if (!v->cur_seg) {
>>> + ret = AVERROR_EOF;
>>> + goto end;
>>> + }
>>> + ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL);
>>> + if (ret > 0)
>>> + goto end;
>>> +
>>> + if (!v->is_restart_needed)
>>> + v->cur_seq_no++;
>>> + v->is_restart_needed = 1;
>>> +
>>> +/*
>>> + ff_format_io_close(v->parent, &v->input);
>>> + v->cur_seq_no++;
>>> + goto restart;
>>> +*/
>>> +end:
>>> + return ret;
>>> +}
>>> +
>>> +static int save_avio_options(AVFormatContext *s)
>>> +{
>>> + DASHContext *c = s->priv_data;
>>> + const char *opts[] = { "headers", "user_agent", "user-agent", "cookies", NULL }, **opt = opts;
>>> + uint8_t *buf = NULL;
>>> + int ret = 0;
>>> +
>>> + while (*opt) {
>>> + if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
>>> + if (buf[0] != '\0') {
>>> + ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
>>> + if (ret < 0)
>>> + return ret;
>>> + }
>>> + }
>>> + opt++;
>>> + }
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
>>> + int flags, AVDictionary **opts)
>>> +{
>>> + av_log(s, AV_LOG_ERROR,
>>> + "A DASH playlist item '%s' referred to an external file '%s'. "
>>> + "Opening this file was forbidden for security reasons\n",
>>> + s->filename, url);
>>> + return AVERROR(EPERM);
>>> +}
>>> +
>>> +static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
>>> +{
>>> + DASHContext *c = s->priv_data;
>>> + AVInputFormat *in_fmt = NULL;
>>> + AVDictionary *in_fmt_opts = NULL;
>>> + uint8_t *avio_ctx_buffer = NULL;
>>> + int ret = 0;
>>> +
>>> + if (pls->ctx) {
>>> + /* note: the internal buffer could have changed, and be != avio_ctx_buffer */
>>> + av_freep(&pls->pb.buffer);
>>> + memset(&pls->pb, 0x00, sizeof(AVIOContext));
>>> + pls->ctx->pb = NULL;
>>> + avformat_close_input(&pls->ctx);
>>> + pls->ctx = NULL;
>>> + }
>>> + if (!(pls->ctx = avformat_alloc_context())) {
>>> + ret = AVERROR(ENOMEM);
>>> + goto fail;
>>> + }
>>> +
>>> + avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
>>> + if (!avio_ctx_buffer ) {
>>> + ret = AVERROR(ENOMEM);
>>> + avformat_free_context(pls->ctx);
>>> + pls->ctx = NULL;
>>> + goto fail;
>>> + }
>>> + if (c->is_live) {
>>> + ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
>>> + } else {
>>> + ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
>>> + }
>>> + pls->pb.seekable = 0;
>>> +
>>> + if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
>>> + goto fail;
>>> +
>>> + pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
>>> + pls->ctx->probesize = 1024 * 4;
>>> + pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE;
>>> + ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
>>> + if (ret < 0) {
>>> + av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist %d\n", (int)pls->rep_idx);
>>> + avformat_free_context(pls->ctx);
>>> + pls->ctx = NULL;
>>> + goto fail;
>>> + }
>>> +
>>> + pls->ctx->pb = &pls->pb;
>>> + pls->ctx->io_open = nested_io_open;
>>> +
>>> + // provide additional information from mpd if available
>>> + ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
>>> + av_dict_free(&in_fmt_opts);
>>> + if (ret < 0)
>>> + goto fail;
>>> + if (pls->n_fragments) {
>>> + ret = avformat_find_stream_info(pls->ctx, NULL);
>>> + if (ret < 0)
>>> + goto fail;
>>> + }
>>> +
>>> +fail:
>>> + return ret;
>>> +}
>>> +
>>> +static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
>>> +{
>>> + int ret = 0;
>>> + int i;
>>> +
>>> + pls->parent = s;
>>> + pls->cur_seq_no = calc_cur_seg_no(s, pls);
>>> + pls->last_seq_no = calc_max_seg_no(pls);
>>> +
>>> + ret = reopen_demux_for_component(s, pls);
>>> + if (ret < 0) {
>>> + goto fail;
>>> + }
>>> + for (i = 0; i < pls->ctx->nb_streams; i++) {
>>> + AVStream *st = avformat_new_stream(s, NULL);
>>> + AVStream *ist = pls->ctx->streams[i];
>>> + if (!st) {
>>> + ret = AVERROR(ENOMEM);
>>> + goto fail;
>>> + }
>>> + st->id = i;
>>> + avcodec_parameters_copy(st->codecpar, pls->ctx->streams[i]->codecpar);
>>> + avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
>>> + }
>>> +
>>> + return 0;
>>> +fail:
>>> + return ret;
>>> +}
>>> +
>>> +static int dash_read_header(AVFormatContext *s)
>>> +{
>>> + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
>>> + DASHContext *c = s->priv_data;
>>> + int ret = 0;
>>> + int stream_index = 0;
>>> +
>>> + c->interrupt_callback = &s->interrupt_callback;
>>> + // if the URL context is good, read important options we must broker later
>>> + if (u) {
>>> + update_options(&c->user_agent, "user-agent", u);
>>> + update_options(&c->cookies, "cookies", u);
>>> + update_options(&c->headers, "headers", u);
>>> + }
>>> +
>>> + if ((ret = parse_manifest(s, s->filename, s->pb)) < 0)
>>> + goto fail;
>>> +
>>> + if ((ret = save_avio_options(s)) < 0)
>>> + goto fail;
>>> +
>>> + /* If this isn't a live stream, fill the total duration of the
>>> + * stream. */
>>> + if (!c->is_live) {
>>> + s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
>>> + }
>>> +
>>> + /* Open the demuxer for curent video and current audio components if available */
>>> + if (!ret && c->cur_video) {
>>> + ret = open_demux_for_component(s, c->cur_video);
>>> + if (!ret) {
>>> + c->cur_video->stream_index = stream_index;
>>> + ++stream_index;
>>> + } else {
>>> + free_representation(c->cur_video);
>>> + c->cur_video = NULL;
>>> + }
>>> + }
>>> +
>>> + if (!ret && c->cur_audio) {
>>> + ret = open_demux_for_component(s, c->cur_audio);
>>> + if (!ret) {
>>> + c->cur_audio->stream_index = stream_index;
>>> + ++stream_index;
>>> + } else {
>>> + free_representation(c->cur_audio);
>>> + c->cur_audio = NULL;
>>> + }
>>> + }
>>> +
>>> + if (!stream_index) {
>>> + ret = AVERROR_INVALIDDATA;
>>> + goto fail;
>>> + }
>>> +
>>> + /* Create a program */
>>> + if (!ret) {
>>> + AVProgram *program;
>>> + program = av_new_program(s, 0);
>>> + if (!program) {
>>> + goto fail;
>>> + }
>>> +
>>> + if (c->cur_video) {
>>> + av_program_add_stream_index(s, 0, c->cur_video->stream_index);
>>> + }
>>> + if (c->cur_audio) {
>>> + av_program_add_stream_index(s, 0, c->cur_audio->stream_index);
>>> + }
>>> + }
>>> +
>>> + return 0;
>>> +fail:
>>> + return ret;
>>> +}
>>> +
>>> +static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
>>> +{
>>> + DASHContext *c = s->priv_data;
>>> + int ret = 0;
>>> + struct representation *cur = NULL;
>>> +
>>> + if (!c->cur_audio && !c->cur_video ) {
>>> + return AVERROR_INVALIDDATA;
>>> + }
>>> + if (c->cur_audio && !c->cur_video) {
>>> + cur = c->cur_audio;
>>> + } else if (!c->cur_audio && c->cur_video) {
>>> + cur = c->cur_video;
>>> + } else if (c->cur_video->cur_timestamp < c->cur_audio->cur_timestamp) {
>>> + cur = c->cur_video;
>>> + } else {
>>> + cur = c->cur_audio;
>>> + }
>>> +
>>> + if (cur->ctx) {
>>> + while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
>>> + ret = av_read_frame(cur->ctx, pkt);
>>> + if (ret >= 0) {
>>> + /* If we got a packet, return it */
>>> + cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
>>> + pkt->stream_index = cur->stream_index;
>>> + return 0;
>>> + }
>>> + if (cur->is_restart_needed) {
>>> + while (!ff_check_interrupt(c->interrupt_callback)) {
>>> + cur->cur_seg_offset = 0;
>>> + cur->init_sec_buf_read_offset = 0;
>>> + if (cur->input)
>>> + ff_format_io_close(cur->parent, &cur->input);
>>> + ret = reopen_demux_for_component(s, cur);
>>> + if (c->is_live && ret) {
>>> + av_usleep(1000*1000);
>>> + continue;
>>> + }
>>> + break;
>>> + }
>>> + cur->is_restart_needed = 0;
>>> + }
>>> +
>>> + }
>>> + }
>>> + return AVERROR_EOF;
>>> +}
>>> +
>>> +static int dash_close(AVFormatContext *s)
>>> +{
>>> + DASHContext *c = s->priv_data;
>>> + if (c->cur_audio) {
>>> + free_representation(c->cur_audio);
>>> + }
>>> + if (c->cur_video) {
>>> + free_representation(c->cur_video);
>>> + }
>>> +
>>> + av_freep(&c->cookies);
>>> + av_freep(&c->user_agent);
>>> + av_dict_free(&c->avio_opts);
>>> + av_freep(&c->base_url);
>>> + return 0;
>>> +}
>>> +
>>> +static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags)
>>> +{
>>> + int ret = 0;
>>> + int i = 0;
>>> + int j = 0;
>>> + int64_t duration = 0;
>>> +
>>> + av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d\n", seek_pos_msec, pls->rep_idx);
>>> +
>>> + // single fragment mode
>>> + if (pls->n_fragments == 1) {
>>> + pls->cur_timestamp = 0;
>>> + pls->cur_seg_offset = 0;
>>> + ff_read_frame_flush(pls->ctx);
>>> + return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
>>> + }
>>> +
>>> + if (pls->input)
>>> + ff_format_io_close(pls->parent, &pls->input);
>>> +
>>> + // find the nearest fragment
>>> + if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
>>> + int64_t num = pls->first_seq_no;
>>> + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
>>> + "last_seq_no[%"PRId64"], playlist %d.\n",
>>> + (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx);
>>> + for (i = 0; i < pls->n_timelines; i++) {
>>> + if (pls->timelines[i]->t > 0) {
>>> + duration = pls->timelines[i]->t;
>>> + }
>>> + duration += pls->timelines[i]->d;
>>> + if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
>>> + goto set_seq_num;
>>> + }
>>> + for (j = 0; j < pls->timelines[i]->r; j++) {
>>> + duration += pls->timelines[i]->d;
>>> + num++;
>>> + if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
>>> + goto set_seq_num;
>>> + }
>>> + }
>>> + num++;
>>> + }
>>> +
>>> +set_seq_num:
>>> + pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
>>> + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n",
>>> + (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
>>> + } else if (pls->fragment_duration > 0) {
>>> + pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
>>> + } else {
>>> + av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing fragment_duration\n");
>>> + pls->cur_seq_no = pls->first_seq_no;
>>> + }
>>> + pls->cur_timestamp = 0;
>>> + pls->cur_seg_offset = 0;
>>> + pls->init_sec_buf_read_offset = 0;
>>> + ret = reopen_demux_for_component(s, pls);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
>>> +{
>>> + int ret = 0;
>>> + DASHContext *c = s->priv_data;
>>> + int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
>>> + s->streams[stream_index]->time_base.den,
>>> + flags & AVSEEK_FLAG_BACKWARD ?
>>> + AV_ROUND_DOWN : AV_ROUND_UP);
>>> + if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
>>> + return AVERROR(ENOSYS);
>>> + if (c->cur_audio) {
>>> + ret = dash_seek(s, c->cur_audio, seek_pos_msec, flags);
>>> + }
>>> + if (!ret && c->cur_video) {
>>> + ret = dash_seek(s, c->cur_video, seek_pos_msec, flags);
>>> + }
>>> + return ret;
>>> +}
>>> +
>>> +static int dash_probe(AVProbeData *p)
>>> +{
>>> + if (!av_stristr(p->buf, "<MPD"))
>>> + return 0;
>>> +
>>> + if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
>>> + av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
>>> + av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
>>> + av_stristr(p->buf, "dash:profile:isoff-main:2011")) {
>>> + return AVPROBE_SCORE_MAX;
>>> + }
>>> + if (av_stristr(p->buf, "dash:profile")) {
>>> + return AVPROBE_SCORE_MAX / 2;
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +#define OFFSET(x) offsetof(DASHContext, x)
>>> +#define FLAGS AV_OPT_FLAG_DECODING_PARAM
>>> +static const AVOption dash_options[] = {
>>> + {NULL}
>>> +};
>>> +
>>> +static const AVClass dash_class = {
>>> + .class_name = "dash",
>>> + .item_name = av_default_item_name,
>>> + .option = dash_options,
>>> + .version = LIBAVUTIL_VERSION_INT,
>>> +};
>>> +
>>> +AVInputFormat ff_dash_demuxer = {
>>> + .name = "dash",
>>> + .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
>>> + .priv_class = &dash_class,
>>> + .priv_data_size = sizeof(DASHContext),
>>> + .read_probe = dash_probe,
>>> + .read_header = dash_read_header,
>>> + .read_packet = dash_read_packet,
>>> + .read_close = dash_close,
>>> + .read_seek = dash_read_seek,
>>> + .flags = AVFMT_NO_BYTE_SEEK,
>>> +};
>>> --
>>> 2.11.0 (Apple Git-81)
>>>
>>>
>>>
>>> _______________________________________________
>>> ffmpeg-devel mailing list
>>> ffmpeg-devel at ffmpeg.org
>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>>
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